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  Sony Vaio laptop power suppy cord (PSU) connection problems 
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Dipanjan Ghosh Apr 05, 2007, 12:30pm EDT Reply - Quote - Report Abuse
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I have a Sony Vaio PCG FX-370 notebook which is around 5 years old. It has developed a problem regarding the power supply connection over the last couple of months.
If i normally connect the power supply cord, it does not receive any power and runs off the battery. But if i wiggle it and wrap the cord around the laptop (which puts some pressure on the connector) or stretch it under the laptop (which tilts the laptop and is extremely annoying), the AC power supply is recognized.
Is there a fix for this problem or a replacement part that can remedy the situation? I am assuming that there is a bad connection but I want to make sure that I know what I am looking for before I try to fix it.
Any help and suggestions are highly appreciated.

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h hardy Aug 16, 2007, 10:59am EDT Reply - Quote - Report Abuse
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>> Re: Sony Vaio laptop power suppy cord (PSU) connection problems

Mine is Vaio PCG-K45
In my case the connection point, from the power cord to the laptop, has a plastic ring in which the plug is inserted. The power cord was pulled to the side (a friend "ran into it" or so I'm told) and cracked the outer ring. I too have to pull the cord at a angle to get the inner and outer conection points to make contact. I'm going to look for a replacement part but thought I'd reply to give you a starting point to look into.

john albrich Aug 16, 2007, 12:08pm EDT Reply - Quote - Report Abuse
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>> Re: Sony Vaio laptop power suppy cord (PSU) connection problems
Definitely check the power cord first before you assume something is wrong within the notebook computer itself. The constant stress at the junction of the connector and the wire often causes the internal wiring to fatigue and break, resulting in an intermittent connection.

If it is a standard 2-conductor "barrel" connector attached to the cord coming from a power "brick", then you may find a replacement at Radio Shack or other electronic supply shop. It shouldn't cost more than US$5. If it's one of the 3-conductor barrel connectors, then it's a little more complicated.

If it's a 2-conductor connector, you can easily check for continuity by connecting a voltmeter to the connector and see if it varies when you wiggle the wire relative to the connector. If it's a 3-conductor connector, it depends on how the Vaio uses the 3rd pin.

More tips and detailed info at:

If you determine it is the brick's connector, and you don't want to repair it yourself, you can buy a 3rd party replacement brick for about US$50. A lot cheaper than the Vaio brick or sending the Vaio in for repair.

However, if the problem is inside the Vaio, you have a more difficult repair job or a more expensive vendor repair action.

Dipanjan Ghosh Aug 16, 2007, 02:12pm EDT Reply - Quote - Report Abuse
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>> Re: Sony Vaio laptop power suppy cord (PSU) connection problems
Back when I started having the problem, I did check the cord connections with a voltmeter. It seemed to be fine. I am certain that the connection problems in my VAIO is with the DC power jack inside the computer. After a lot of research, I realized that it was not worth fixing. The power jack is cheap (~ 10 bucks) but the replacement is expensive if done by a repair shop. I also looked at doing it myself but dont have enough confidence in my soldering capabilites cause it requires some fine skill. My VAIO is now used as a desktop....I try not to upset the cable too much and it still works fantastic.

If you can do some fine soldering, I suggest you do it yourself. If 70 to 100 bucks is not big deal to you, then you might as well get it done by the pros. The only thing is that the warranty is usually about 60 to 90 days and it is highly possible that it may snap again. Hope you can find and fix your problem.

john albrich Aug 16, 2007, 02:24pm EDT Reply - Quote - Report Abuse
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>> Re: Sony Vaio laptop power suppy cord (PSU) connection problems
If you don't have it already set up to do so, you may want to configure your Vaio so that when the battery is at 3% or so, it suspends your current session to disk and shuts off....NOT just suspends to RAM. That way if something happens to the connection while you're away for awhile (and you won't see any low battery warning) you're covered.

Suspending to RAM continues to consume power and when the battery finally depletes you lose your session and possibly some data.

I don't know how you're currently securing the power connection, but since you're using it as a desktop, you might be able to stabilize the connector with hot-melt glue. It's removable if you really want to remove it but until then it's a fairly good way to keep the connectors from moving around relative to each other.

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